CVE-2009-4408

Multiple cross-site scripting (XSS) vulnerabilities in models.parser in PyForum 1.0.3 and possibly earlier versions, and possibly zForum, allow remote attackers to inject arbitrary web script or HTML via crafted BBcode (1) img or (2) url tags, which are not properly handled when a post is viewed.

Published: 2009-12-23 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-4408 is rated Low Risk (38.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-4408

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.29% 1.03% +0.75%
2 2025-03-17 0.22% 0.29% +0.07%
3 2023-03-07 — 0.22% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-4408

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2009-4408

Affected software / configurations for CVE-2009-4408

Vendor Product Version Raw CPE
pyforum pyforum <= 1.0.3 cpe:2.3:a:pyforum:pyforum:*:*:*:*:*:*:*:*
pyforum pyforum 1.0.0 cpe:2.3:a:pyforum:pyforum:1.0.0:*:*:*:*:*:*:*
pyforum pyforum 1.0.1 cpe:2.3:a:pyforum:pyforum:1.0.1:*:*:*:*:*:*:*
pyforum pyforum 1.0.2 cpe:2.3:a:pyforum:pyforum:1.0.2:*:*:*:*:*:*:*

References for CVE-2009-4408

cvelogic Threat Intelligence